How to wire a 4 wire tow wiring to a 1989 Dodge Dakota?

I am trying to install a 4 way tow wiring to my 1989 Dodge Dakota. However the colors (yellow, green, white & brown) don't match all the colors leading to the trucks taillights. What color should go where?

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Check it with a test light. White-ground, Yellow-left turn, Green-right turn, Brown-tailights. Check it on the truck first. There are seperate fuses for just the trailer wiring in the fuse box under the hood. The Blue and Red wires are for Trailer brakes, don't worry about those.

TO: ALL TOYOTA DEALER PRINCIPALS,SERVICE MANAGERS, PARTS MANAGERSSUBJECT: SPECIAL SERVICE CAMPAIGN 10H(2000 TUNDRA AND 1999 - 2000 TACOMA TRAILER TOWING WIRE HARNESSCONVERTER REPLACEMENT)Toyota will initiate a Special Service Campaign to replace the Toyota Trailer Towing Wire HarnessConverter (converter) on certain 2000 model year Tundra and 1999 - 2000 model year Tacomavehicles equipped with a genuine Toyota Trailer Towing Hitch or Bumper Hitch. This accessoryis included in the Towing Hitch Kit installed at ports (PIO) and by dealers (***); it is also sold bydealers as an over-the-counter or service part.An electrical short or open circuit can cause a fault in the genuine Toyota Trailer Towing Wire HarnessConverter (converter). This can cause a failure of the converter, and if a trailer is being towed at the time,non-operation of the trailer lights. In limited cases, the converter housing could become heat-deformed.In the case of the Tundra, the circuitry utilized in the converter was inadequate to properly managevehicle and/or trailer-side voltage spikes. If the converter is exposed to a voltage spike it may cause anelectrical short or open circuit within the converter.As for the Tacoma, due to deficient waterproofing and improper installation location of the converter,which is mounted in the lower portion of the taillight cavity of the vehicle, an electrical short circuit willoccur if water enters the converter housing.The following vital information is provided to inform you and your staff of the campaign notificationschedule and your degree of involvement.1. Owner Notification Letter Mailing DateThe owner notification will be conducted in two phases:• The first phase will be launched in late August and involve vehicles equipped with portinstalled (PIO) genuine Toyota Towing Hitch Kits.• The remaining vehicle owners, whose vehicles may be equipped with a dealer installed (***)genuine Toyota Trailer Towing Wire Harness Converter, will be notified in the second phaseto be launched in early September.We have attached copies of the owner notification letters for your reference.If you are contacted by an owner of an involved vehicle, who has not yet received a notification,please verify eligibility through TDN or TIS, inspect the vehicle to assure it is equipped with theaffected part, and perform repairs as outlined in the attached Technical Instructions.

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1. Red is the hot wire from the battery.
2. Dark Blue is the run wire. This wire powers PCM, and engine and well as all accessories when the key is on.
3. Yellow is the start wire. It powers the engine, ECU and starter circuit when the key is turned to start.
4. Last terminal is accessories. I don't know the color, but it will power the radio, blower, windows, mirrors, etc. when key is turned to ACC. Some diagrams of the switch are below. Please let me know if you have any questions.

Yes. But do you have seperate yellow turn signal lights in the rear or do the turn signals work independant of the brake lights? If yes then you need to wire in a taillight converter. It takes your seperate left & right turn signals combines them with your brake lights on 2 wires instead of 3 leaving you with your normal 4 wires in total instead of 5. 1 Left turn & brake light. 1 Right turn & brake. 1 Taillight. 1 Ground. = 4 wires in total. If you dont have seperate rear turn signals just find left turn wire in taillight assembly, Right turn wire & Taillight & a good ground & you are done. On trailer plug yellow is left, green is right ,brown is tailight & white is ground.

if you go to your local stereo shop or best buy, they sell little harnesses that will pjug into the vehicles harness and wire into the new stereo with all colors matching. please use appropriate connectors and tape. duct tape is not enough and will not insulate. these electrical adapters at best buy are like $20. ask for help.